CN217202244U - Integrated high-efficiency denitrification sewage reactor - Google Patents
Integrated high-efficiency denitrification sewage reactor Download PDFInfo
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- CN217202244U CN217202244U CN202123457389.7U CN202123457389U CN217202244U CN 217202244 U CN217202244 U CN 217202244U CN 202123457389 U CN202123457389 U CN 202123457389U CN 217202244 U CN217202244 U CN 217202244U
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- ammonia oxidation
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- 239000010865 sewage Substances 0.000 title claims abstract description 95
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 134
- 239000010802 sludge Substances 0.000 claims abstract description 71
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 67
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 67
- 230000003647 oxidation Effects 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000004062 sedimentation Methods 0.000 claims abstract description 51
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 238000005086 pumping Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 27
- 230000001546 nitrifying effect Effects 0.000 claims description 17
- 238000005273 aeration Methods 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 18
- 229910052760 oxygen Inorganic materials 0.000 description 18
- 239000001301 oxygen Substances 0.000 description 18
- 230000008569 process Effects 0.000 description 17
- 239000000370 acceptor Substances 0.000 description 7
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 7
- 229910002651 NO3 Inorganic materials 0.000 description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 5
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 4
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 4
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 4
- 238000005842 biochemical reaction Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 206010021143 Hypoxia Diseases 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000006396 nitration reaction Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241001453382 Nitrosomonadales Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The utility model discloses an integrated high-efficiency denitrification sewage reactor, which comprises a deoxidizing tank, an anaerobic ammonia oxidation tank, an anaerobic tank, an anoxic tank, a primary aerobic tank, a secondary aerobic tank and a sedimentation tank which are connected in sequence; the deoxidation tank is provided with a water inlet channel, a first water passing channel is arranged between the deoxidation tank and the anaerobic ammonia oxidation tank, a first sludge discharge channel is arranged at the bottom of the anaerobic ammonia oxidation tank, a second water passing channel is arranged at the top of the anaerobic ammonia oxidation tank, the anaerobic tank, the anoxic tank, the primary aerobic tank, the secondary aerobic tank and the sedimentation tank are all communicated up and down, a second sludge discharge channel for discharging sludge is arranged at the bottom of the secondary aerobic tank, and the sedimentation tank is provided with a water discharge channel; a sewage backflow mechanism for pumping the sewage in the first-stage aerobic tank back to the deoxidizing tank is arranged in the first-stage aerobic tank, and a sludge backflow mechanism for pumping the sewage in the first-stage aerobic tank back to the anaerobic tank is arranged in the sedimentation tank; the denitrification sewage reactor can effectively denitrify, and simultaneously simplifies the structure, reduces the occupied area and saves the construction and operation cost.
Description
[ technical field ] A
The utility model particularly relates to a high-efficient denitrogenation sewage reactor of integration.
[ background of the invention ]
In the field of sewage treatment, the anaerobic ammonia oxidation process breaks through the basic theoretical concept in the traditional biological denitrification process, ammonia is used as an electron donor and nitrate or nitrite is used as an electron acceptor under the anaerobic condition to be oxidized into nitrogen, the oxygen supply amount is saved by more than 60% compared with the whole-course nitrification process, and the sludge yield in the process is greatly reduced compared with the traditional process, so that the anaerobic ammonia oxidation process is gradually and widely applied in the field of sewage treatment.
At present, two anaerobic ammonia oxidation processes are mainly adopted, wherein one process is a two-stage process, namely, partial nitrification and anaerobic ammonia oxidation are respectively carried out in two independent reactors; the other is an integrated process, namely the short-cut nitrification and the anaerobic ammonium oxidation reaction are carried out in the same reactor. However, in the conventional anaerobic ammonia oxidation process, in order to fully deoxidize sewage, a sedimentation tank for sludge sedimentation is generally arranged in front of the deoxidation tank, so that the sewage is deoxidized after being precipitated and then passes through an anoxic area and an aerobic area, and finally the sewage is denitrified.
The utility model discloses just produce based on foretell not enough.
[ Utility model ] content
The utility model aims at overcoming the defects of the prior art, providing a denitrification sewage reactor, simplifying the structure of the denitrification sewage reactor when effectively denitrifying, reducing the occupied area, and saving the construction and operation cost.
The utility model is realized through the following technical scheme:
an integrated high-efficiency denitrification sewage reactor comprises a deoxidation tank, an anaerobic ammonia oxidation tank, an anaerobic tank, an anoxic tank, a primary aerobic tank, a secondary aerobic tank and a sedimentation tank which are connected in sequence;
the anaerobic tank, the anoxic tank, the primary aerobic tank, the secondary aerobic tank and the sedimentation tank are all communicated from top to bottom, the secondary aerobic tank is provided with a second sludge discharge channel for discharging sludge at the bottom, and the sedimentation tank is provided with a drainage channel for discharging sewage in the sedimentation tank;
the primary aerobic tank is internally provided with a sewage backflow mechanism for pumping the sewage in the primary aerobic tank back to the deoxidizing tank, and the sedimentation tank is internally provided with a sludge backflow mechanism for pumping the sewage in the primary aerobic tank back to the anaerobic tank.
Preferably, the integrated efficient denitrification sewage reactor is characterized in that the deoxidation tank is a circular tank, and the anaerobic ammonia oxidation tank, the anaerobic tank, the anoxic tank, the primary aerobic tank, the secondary aerobic tank and the sedimentation tank are sequentially distributed outside the deoxidation tank from inside to outside in concentric circles along the radial direction of the deoxidation tank.
Preferably, water through holes are formed between the deoxidation tank and the anaerobic ammonia oxidation tank and between the anaerobic ammonia oxidation tank and the anaerobic ammonia oxidation tank.
In detail, high-efficient denitrogenation sewage reactor of integration, first water channel including set up in anaerobic ammonium oxidation pond bottom and encircle the annular stringing that the deoxidation pond set up, the deoxidation pond be provided with a plurality of straight tube stringing that are the centre of a circle and distribute, annular stringing is connected to the deoxidation pond other end to straight tube stringing one end.
In detail, the second water passing channel comprises a water outlet groove arranged at the mouth of the anaerobic ammonia oxidation tank, and the water outlet end of the water outlet groove is communicated with the anaerobic tank.
In detail, the sewage backflow mechanism comprises a nitrifying liquid backflow pump arranged at the bottom of the first-stage aerobic tank, the water outlet end of the nitrifying liquid backflow pump is connected with a nitrifying liquid backflow pipe, and the water outlet end of the nitrifying liquid backflow pipe is communicated with the deoxidizing tank.
In detail, the sludge backflow mechanism comprises a sludge scraping and sucking machine arranged in a sedimentation tank, a sludge backflow groove is formed in the sedimentation tank, a sludge outlet end of the sludge scraping and sucking machine is located above the sludge backflow groove, the sludge backflow groove is connected with a sludge backflow pipe, and the sludge backflow pipe is communicated with an anaerobic tank.
In detail, a deoxidizing and homogenizing stirrer is arranged in the deoxidizing pool.
Preferably, the deoxidation tank, the anaerobic ammonia oxidation tank, the anaerobic tank, the anoxic tank, the primary aerobic tank and the secondary aerobic tank are all internally provided with flow impellers.
Preferably, the primary aerobic tank and the secondary aerobic tank are both provided with aeration devices.
Compared with the prior art, the utility model has the following advantages:
the utility model discloses a be provided with in the sedimentation tank and be used for drawing back the mud return mechanism in the anaerobism pond with sewage in it, mud part in the sedimentation tank carries out biological dephosphorization to the anaerobism pond through mud return mechanism backward flow, surplus mud flows to one-level good oxygen pond and second grade good oxygen pond through the bottom of the pool intercommunication structure under, returns the sedimentation tank at last, the process of mud of such shape constantly dephosphorization, progressively deposit, simultaneously, one-level good oxygen pond in be equipped with the sewage return mechanism who is used for drawing back the sewage in it to the deoxidation pond, sewage flows to one-level good oxygen pond under the thrust effect of rivers, in-process mud deposits gradually, partial mud flows to one-level good oxygen pond along with sewage, in rethread sewage return mechanism draws back sewage and partial mud to the deoxidation pond, form and nitrify the backward flow liquid, the sewage of deoxidation pond mixes and accomplishes the deoxidation with the nitrifying backward flow liquid of one-level good oxygen pond, dissolved oxygen is less than 0.2mg/L and then enters an anaerobic ammonia oxidation tank through a first water passage 11, so that the sewage is continuously precipitated in the processes of a deoxidation tank, an anaerobic ammonia oxidation tank, an anaerobic tank, an anoxic tank and a primary aerobic tank, the returned nitrifying liquid and inlet water are fully mixed, the subsequent anaerobic ammonia oxidation reaction is favorably carried out, the sewage is continuously deoxidized in the deoxidation tank, the ammonia nitrogen and nitrite nitrogen in the sewage are removed by anaerobic denitrification in the anaerobic ammonia oxidation tank, the nitrate nitrogen in the water is removed by traditional denitrification in the anaerobic tank and the anoxic tank, the short-cut nitrification reaction is carried out in the primary aerobic tank to provide enough electron acceptors for anaerobic ammonia oxidation, and then the conventional aerobic biochemical reaction is carried out in a secondary aerobic zone to ensure that the residual pollutants such as ammonia nitrogen, COD and the like are removed, therefore, the sludge between the deoxidation tank and the primary aerobic tank continuously circulates, need not set up the sedimentation tank before the deoxidation tank, simultaneously, the mud part in the sedimentation tank passes through mud backward flow mechanism and flows back to the anaerobism pond, need not to build independent mud backward flow pond, simplifies the structure of denitrogenation sewage reactor when guaranteeing effective denitrogenation, reduces area, sparingly builds and the operation cost.
[ description of the drawings ]
Fig. 1 is a first schematic top view of an embodiment of the present invention;
fig. 2 is a schematic top view of the embodiment of the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 4 is a cross-sectional view taken at B-B of FIG. 1;
fig. 5 is a schematic diagram of the operation of an embodiment of the present invention.
[ detailed description ] embodiments
The utility model is further described with the following figures:
the orientations described in the specification, such as "upper", "lower", "left", "right", "front", "back", and the like, are based on the orientation of the drawings, and are intended to describe relationships between respective components, and do not indicate unique or absolute positional relationships between respective components, and are only one embodiment of the present invention, and are not limited to the embodiment thereof.
Example (b):
as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the integrated high efficiency denitrification sewage reactor comprises the following independently arranged tanks: the system comprises a deoxidation tank 1, an anaerobic ammonia oxidation tank 2, an anaerobic tank 3, an anoxic tank 4, a primary aerobic tank 5, a secondary aerobic tank 6 and a sedimentation tank 7 which are connected in sequence;
the deoxidation tank 1 is provided with a water inlet channel 10 for sewage to enter, a first water passing channel 11 for communicating the deoxidation tank 1 and the anaerobic ammonia oxidation tank 2 is arranged between the deoxidation tank 1 and the anaerobic ammonia oxidation tank, the bottom of the anaerobic ammonia oxidation tank 2 is provided with a first sludge discharge channel 22 for discharging sludge in the anaerobic ammonia oxidation tank, the top of the anaerobic ammonia oxidation tank 2 is provided with a second water passing channel 21 for discharging the upper layer sewage in the anaerobic ammonia oxidation tank to the anaerobic tank 3, the anaerobic tank 3, the anoxic tank 4, the primary aerobic tank 5, the secondary aerobic tank 6 and the sedimentation tank 7 are all communicated up and down, the bottom of the secondary aerobic tank 6 is provided with a second sludge discharge channel 61 for discharging sludge, the sedimentation tank 7 is provided with a drainage channel 71 for discharging sewage in the sedimentation tank, the sludge is deposited in the sedimentation tank 7 under the thrust of water flow, flows into the secondary aerobic tank 6 through a structure communicated with the bottom and flows out of the second sludge discharge channel 61;
the sedimentation tank 7 is internally provided with a sludge backflow mechanism 72 for pumping the sewage in the sedimentation tank back to the anaerobic tank 3, the sludge in the sedimentation tank 7 partially flows back to the anaerobic tank 3 through the sludge backflow mechanism 72 for biological phosphorus removal, the residual sludge flows to the primary aerobic tank 5 and the secondary aerobic tank 6 through a tank bottom communicating structure and finally returns to the sedimentation tank 7, so that the sludge is continuously dephosphorized and gradually sedimentated, meanwhile, the primary aerobic tank 5 is internally provided with a sewage backflow mechanism 51 for pumping the sewage in the primary aerobic tank back to the deoxidation tank 1, the sewage flows to the primary aerobic tank 5 under the thrust action of water flow, the sludge is gradually sedimentated in the process, part of the sludge flows into the primary aerobic tank 5 along with the sewage, and then the sewage and part of the sludge are pumped back to the deoxidation tank 1 through the sewage backflow mechanism 51 to form a nitrification backflow liquid, the sewage in the deoxidation tank 1 is mixed with the nitrification backflow liquid in the primary aerobic tank 5 to complete deoxidation, the dissolved oxygen is less than 0.2mg/L and then enters the anaerobic ammonia oxidation tank 2 through the first water passing channel 11, so that in the process of the sewage in the deoxidation tank 1, the anaerobic ammonia oxidation tank 2, the anaerobic tank 3, the anoxic tank 4 and the primary aerobic tank 5, the sludge is continuously precipitated, the reflux nitrifying liquid and the inlet water are fully mixed, which is beneficial to the subsequent anaerobic ammoxidation reaction, the sewage is continuously deoxidized in the deoxidizing tank 1, anaerobic denitrification is carried out in the anaerobic ammonia oxidation tank 2 to remove ammonia nitrogen and nitrite nitrogen in the sewage, traditional denitrification is carried out in the anaerobic tank 3 and the anoxic tank 4 to remove nitrate nitrogen in the sewage, the short-cut nitration reaction is carried out in the primary aerobic tank 5 to provide enough electron acceptors for anaerobic ammonia oxidation, and then the conventional aerobic biochemical reaction is carried out in the secondary aerobic zone to ensure that the residual pollutants such as ammonia nitrogen, COD, BOD and the like are removed.
Therefore, through the continuous circulation of mud between deoxidation pond 1 and one-level good oxygen pond 5, need not set up the sedimentation tank before deoxidation pond 1, simultaneously, the mud part in the sedimentation tank 7 passes through mud backward flow mechanism 72 backward flow to anaerobism pond 3, need not to build independent mud backward flow pond, simplifies the structure of denitrogenation sewage reactor when guaranteeing effectively denitrogenation, reduces area, sparingly builds and the running cost.
As an optimization scheme, the deoxidation tank 1 is a circular tank, and the anaerobic ammonia oxidation tank 2, the anaerobic tank 3, the anoxic tank 4, the primary aerobic tank 5, the secondary aerobic tank 6 and the sedimentation tank 7 are sequentially distributed outside the deoxidation tank 1 in concentric circles along the radial direction of the deoxidation tank 1 from inside to outside, so that the structure of the denitrification sewage reactor is further simplified, and the floor area is reduced.
Further optimized, the deoxidizing tank 1, the anaerobic ammonia oxidation tank 2, the anaerobic tank 3, the anoxic tank 4, the primary aerobic tank 5 and the secondary aerobic tank 6 are all internally provided with flow impellers 9, so that annular sewage circulation is formed in each tank, the chemical and biological reaction speed of sewage is increased, and the sewage purification efficiency is improved.
Further optimally, first water channel 11 including setting up in 2 bottoms of anammox tank and encircle annular stringing 111 that deoxidation tank 1 set up, deoxidation tank 1 be provided with a plurality of straight tube stringing 112 that are the centre of a circle and distribute, annular stringing 111 is connected to 1 other end in deoxidation tank of straight tube stringing 112 one end connection, sewage in deoxidation tank 1 passes through straight tube stringing 112 and reaches annular stringing 111, annular stringing 111 only need set up apopore or mouth of pipe for sewage is all flowed simultaneously in each position in anammox tank 2, is favorable to improving the biochemical reaction in anammox tank 2.
Preferably, water through holes 12 are formed between the deoxidation tank 1 and the anaerobic ammonia oxidation tank 2 and between the anaerobic ammonia oxidation tank 2 and the anaerobic tank 3, the anaerobic ammonia oxidation tank 2 enters the anaerobic tank 3 through the water through holes 12 under the push of water power, enters the anoxic area and flows to the anoxic tank 4, meanwhile, mixed liquor in the first-stage aerobic tank 5 flows back to the anoxic tank 4 and enters the anoxic area, and two streams of water are subjected to denitrification together to remove nitrate nitrogen in sewage. Certainly also can be between oxygen deficiency pond 4 and one-level good oxygen pond 5, set up water hole 12 between one-level good oxygen pond 5 and the second grade good oxygen pond 6, water hole 12 evenly is convenient for the effect of sewage backward flow, simultaneously the position of crossing water hole 12 can set up backward flow weir door 16, the effect of cooperation impeller 9, form annular rivers in oxygen deficiency pond 4, one-level good oxygen pond 5 and second grade good oxygen pond 6, partial mixed liquid gets into adjacent region through water hole 12 during the flow, thereby form good oxygen to the interior backward flow of nitrifying-denitrification of oxygen deficiency, can control the backward flow volume through the aperture of control backward flow weir door 16, adjust the denitrogenation effect.
In detail, as shown in fig. 1 to 4, the second water passage 21 includes a water outlet groove 211 disposed at the mouth of the anammox tank 2, and the water outlet end of the water outlet groove 211 is communicated with the anaerobic tank 3.
In detail, as shown in fig. 1 to 4, the sewage backflow mechanism 51 includes a nitrifying liquid backflow pump 511 disposed at the bottom of the primary aerobic tank 5, a nitrifying liquid backflow pipe 512 is connected to a water outlet end of the nitrifying liquid backflow pump 511, and a water outlet end of the nitrifying liquid backflow pipe 512 is communicated with the deoxidizing tank 1.
In detail, as shown in fig. 1 to 4, the sludge backflow mechanism 72 includes a sludge scraping and sucking machine 721 arranged in the sedimentation tank 7, the sedimentation tank 7 is provided with a sludge backflow groove 722, a sludge outlet end of the sludge scraping and sucking machine 721 is located above the sludge backflow groove 722, the sludge backflow groove 722 is connected with a sludge backflow pipe 723, and a sludge outlet end of the sludge backflow pipe 723 is communicated with the anaerobic tank 3.
Preferably, as shown in fig. 1 and 3, a deoxidizing and homogenizing stirrer 8 is arranged in the deoxidizing pool 1, which is beneficial to removing oxygen in the sewage.
Preferably, as shown in fig. 1 and 3, the primary aerobic tank 5 and the secondary aerobic tank 6 are both provided with aeration devices 15, and the aeration devices 15 are microporous aeration pipes, and comprise main pipes and fine branch pipes, so that the short-cut nitrification reaction is facilitated to generate nitrite rather than nitrate, an electron acceptor is provided for anaerobic ammonia oxidation, and part of COD is removed.
In detail, as shown in fig. 1 and 3, the drainage channel 71 includes a drainage channel 711 disposed at the mouth of the sedimentation basin 7, and a drainage pipe 712 is connected to the bottom of the drainage channel 711. Preferably, a scum baffle 73 and a scum hopper 74 are further arranged at the mouth of the sedimentation tank 7, the scum baffle 73 is arranged between the mouth of the drainage tank 711 and the mouth of the sedimentation tank 7, so that scum floating in the sedimentation tank 7 is blocked on the side wall of the scum baffle 73 and enters the scum hopper 74 along the water flow, and the scum hopper 74 can be connected with a scum discharge channel.
As shown in FIG. 5, the denitrification principle of the present invention is:
A. introducing the sewage into a deoxidizing tank 1, stirring, deoxidizing and homogenizing the sewage by a stirrer 8, and mixing the sewage and the reflux nitrifying liquid into a mixed liquid;
B. the mixed liquor enters an anaerobic ammonia oxidation tank 2 through a water distribution pipe, the mixed liquor after deoxidation in the anaerobic ammonia oxidation tank 2 takes ammonia as an electron donor and nitrite as an electron acceptor to react under the action of anaerobic ammonia oxidizing bacteria with a film, so as to generate N2, ammonia nitrogen and nitrite nitrogen in water are removed at the same time, sludge at the bottom of the anaerobic ammonia oxidation tank 2 is discharged,
C. the supernatant of the mixed liquid flows into an anaerobic tank 3 through a water tank, then flows into an anoxic tank 4, a primary aerobic tank 5, a secondary aerobic tank 6 and a sedimentation tank 7 in sequence, sewage on the upper layer of the sedimentation tank 7 is discharged, the primary aerobic tank 5 generates a short-range nitration reaction inside to generate nitrite instead of nitrate by controlling biochemical parameters, an electron acceptor is provided for anaerobic ammonia oxidation, part of COD is removed, the secondary aerobic tank 6 controls aeration amount to generate a nitration reaction inside to generate nitrate, the part of nitrate is mixed with the mixed liquid in the primary aerobic tank 5 and then flows back to the anoxic tank 4 for denitrification, and meanwhile, the residual COD in the sewage is removed under the action of aerobic microorganisms;
D. part of the sewage in the secondary aerobic tank 6 flows back to the primary aerobic tank 5; E. pumping the sewage at the bottom of the primary aerobic tank 5 back to the deoxidizing tank 1 to form a reflux nitrifying liquid; F. the sludge at the bottom of the sedimentation tank 7 is pumped back to the anaerobic tank 3.
D, E and F, wherein the sewage flows into the first-stage aerobic tank 5 under the thrust of water flow, sludge is gradually precipitated in the process, part of the sludge flows into the first-stage aerobic tank 5 along with the sewage, the sewage and part of the sludge are pumped back into the deoxidation tank 1 through the sewage backflow mechanism 51 to form nitrified backflow liquid, the sewage in the deoxidation tank 1 is mixed with the nitrified backflow liquid in the first-stage aerobic tank 5 to complete deoxidation, dissolved oxygen is less than 0.2mg/L and then enters the anaerobic ammonia oxidation tank 2 through the first water passage 11, so that the sewage is subjected to anaerobic denitrification in the anaerobic ammonia oxidation tank 2 to remove ammonia nitrogen and nitrite nitrogen in the sewage in the anaerobic ammonia oxidation tank 2 while the sludge is continuously precipitated in the processes of the deoxidation tank 1, the anaerobic ammonia oxidation tank 2, the anaerobic tank 3, the anoxic tank 4 and the first-stage aerobic tank 5, the traditional denitrification is carried out in the anaerobic tank 3 and the anoxic tank 4 to remove nitrate nitrogen in water, the short-cut nitrification reaction is carried out in the primary aerobic tank 5 to provide enough electron acceptors for anaerobic ammonia oxidation, and then the conventional aerobic biochemical reaction is carried out in the secondary aerobic zone to ensure that the residual pollutants such as ammonia nitrogen, COD, BOD and the like are removed. Therefore, through the continuous circulation of the sludge between the deoxidation tank 1 and the primary aerobic tank 5, the deoxidation tank 1 is not required to be provided with a sedimentation tank, and meanwhile, the sludge in the sedimentation tank 7 partially flows back to the anaerobic tank 3 through the sludge backflow mechanism 72, so that an independent sludge backflow tank is not required to be built, the structure of the denitrification sewage reactor is simplified while effective denitrification is ensured, the occupied area is reduced, and the construction cost and the operation cost are saved.
As a preferable scheme, considering that the influence of the ordinary biochemical sludge entering the anaerobic ammonia oxidation tank 2 on the anaerobic ammonia oxidation bacteria can be generated, the anaerobic ammonia oxidation tank 2 adopts a biomembrane method, and a sludge discharge port is arranged in the anaerobic ammonia oxidation tank 2, so that the adverse influence of the returned nitrified liquid on the anaerobic ammonia oxidation is avoided.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the schemes is not described herein. It should be pointed out that, for the person skilled in the art, without departing from the structure of the invention, several variants and modifications can be made, which should also be regarded as the scope of protection of the invention, which will not affect the effectiveness of the implementation of the invention and the utility of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. An integrated high-efficiency denitrification sewage reactor is characterized in that:
comprises a deoxidizing tank (1), an anaerobic ammonia oxidation tank (2), an anaerobic tank (3), an anoxic tank (4), a primary aerobic tank (5), a secondary aerobic tank (6) and a sedimentation tank (7) which are connected in sequence;
the deoxidizing tank (1) is provided with a water inlet channel (10) for sewage to enter, a first water passing channel (11) communicated with the deoxidation tank (1) and the anaerobic ammonia oxidation tank (2) is arranged between the deoxidation tank and the anaerobic ammonia oxidation tank, the bottom of the anaerobic ammonia oxidation tank (2) is provided with a first sludge discharge channel (22) for discharging sludge in the anaerobic ammonia oxidation tank, the top of the anaerobic ammonia oxidation tank (2) is provided with a second water passing channel (21) for discharging the upper layer sewage in the anaerobic ammonia oxidation tank to the anaerobic tank (3), the anaerobic tank (3), the anoxic tank (4), the primary aerobic tank (5), the secondary aerobic tank (6) and the sedimentation tank (7) are all communicated up and down, a second sludge discharge channel (61) for discharging sludge is arranged at the bottom of the secondary aerobic tank (6), the sedimentation tank (7) is provided with a drainage channel (71) for discharging sewage in the sedimentation tank;
the sewage treatment device is characterized in that a sewage backflow mechanism (51) for pumping the sewage in the first-stage aerobic tank (5) back to the deoxidizing tank (1) is arranged in the first-stage aerobic tank, and a sludge backflow mechanism (72) for pumping the sewage in the sedimentation tank (7) back to the anaerobic tank (3) is arranged in the sedimentation tank.
2. The integrated high efficiency denitrification sewage reactor according to claim 1, wherein: the deoxidation tank (1) is a circular tank, and the anaerobic ammonia oxidation tank (2), the anaerobic tank (3), the anoxic tank (4), the primary aerobic tank (5), the secondary aerobic tank (6) and the sedimentation tank (7) are sequentially distributed outside the deoxidation tank (1) from inside to outside along the radial direction of the deoxidation tank (1) in concentric circles.
3. The integrated high efficiency denitrification sewage reactor according to claim 1, wherein: and water through holes (12) are formed between the deoxidation tank (1) and the anaerobic ammonia oxidation tank (2) and between the anaerobic ammonia oxidation tank (2) and the anaerobic tank (3).
4. The integrated high efficiency denitrification sewage reactor according to claim 2, wherein: the first water channel (11) comprises an annular pipe distribution (111) which is arranged at the bottom of the anaerobic ammonia oxidation tank (2) and surrounds the deoxidation tank (1), the deoxidation tank (1) is provided with a plurality of straight pipe distribution (112) distributed in the circle center, and one end of each straight pipe distribution (112) is connected with the other end of the deoxidation tank (1) and is connected with the annular pipe distribution (111).
5. The integrated high efficiency denitrification sewage reactor according to claim 1, wherein: the second water passing channel (21) comprises a water outlet groove (211) arranged at the mouth of the anaerobic ammonia oxidation tank (2), and the water outlet end of the water outlet groove (211) is communicated with the anaerobic tank (3).
6. The integrated high efficiency denitrification sewage reactor according to claim 1, wherein: the sewage backflow mechanism (51) comprises a nitrifying liquid backflow pump (511) arranged at the bottom of the first-level aerobic tank (5), the water outlet end of the nitrifying liquid backflow pump (511) is connected with a nitrifying liquid backflow pipe (512), and the water outlet end of the nitrifying liquid backflow pipe (512) is communicated with the deoxidizing tank (1).
7. The integrated high efficiency denitrification sewage reactor according to claim 1, wherein: the sludge backflow mechanism (72) comprises a sludge scraping and sucking machine (721) arranged in a sedimentation tank (7), a sludge backflow groove (722) is formed in the sedimentation tank (7), the sludge outlet end of the sludge scraping and sucking machine (721) is located above the sludge backflow groove (722), the sludge backflow groove (722) is connected with a sludge backflow pipe (723), and the sludge outlet end of the sludge backflow pipe (723) is communicated with the anaerobic tank (3).
8. The integrated high efficiency denitrification sewage reactor according to claim 1, wherein: a deoxidizing and homogenizing stirrer (8) is arranged in the deoxidizing pool (1).
9. The integrated high efficiency denitrification sewage reactor according to claim 2, wherein: and flow impellers (9) are arranged in the deoxidation tank (1), the anaerobic ammonia oxidation tank (2), the anaerobic tank (3), the anoxic tank (4), the primary aerobic tank (5) and the secondary aerobic tank (6).
10. The integrated high efficiency denitrification sewage reactor according to claim 1, wherein: aeration devices (15) are arranged in the first-stage aerobic tank (5) and the second-stage aerobic tank (6).
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